>>> import statsmodels.api as sm
>>> dta = sm.datasets.macrodata.load()
>>> dta.data[['infl', 'realgdp']].view((float,2))
Traceback (most recent call last):
  File "tmp.py", line 4, in <module>
    dta.data[['infl', 'realgdp']].view((float,2))
  File "/Users/rgommers/Code/numpy/numpy/core/records.py", line 496, in view
    return self.__array__().view(dtype)
ValueError: new type not compatible with array.